Prepare a frequency distribution by inclusive method taking class interval of 7 from the following data.
28,17,15,22,29,21,23,27,18,12,7,2,9,4,6,1,8,3,10,5,20,16,12,8,4,33,27,21,15,9,3,36,27,18,9,2,4,6,32,31,29,18,14,13,15,11,9,7,1,5,37,32,28,26,24,20,19,25,19,20

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Frequency Distribution

(inclusive Method)

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Prepare a frequency distribution by inclusive method taking class interval of 7 from the following data:

28	17	15	22	29	21	23	27	18	12	7	2	9	4
1	8	3	10	5	20	16	12	8	4	33	27	21	15
3	36	27	18	9	2	4	6	32	31	29	18	14	13
15	11	9	7	1	5	37	32	28	26	24	20	19	25
19	20	6	9

The following are the marks scored in a unit test (out of 25). Prepare a frequency distribution table, taking the class intervals as 0-4, 5-9, 10-14, 15-19, 20-24:

21, 14, 3, 7, 23, 18, 24, 16, 18, 17, 20, 10, 17, 18, 21, 23, 19, 12, 14, 9, 16, 18, 12, 14, 11.

From the table (i) find the mid-points of each class interval; (ii) find the class interval having maximum frequency; (iii) find the range of the scores.

In the following data, the number of class intervals, (by inclusive method), and taking 4 as the magnitude of class intervals will be

31, 23, 19, 29, 22, 20, 16, 10, 13, 34

38, 33, 28, 21, 15, 18, 36, 24, 18, 15

12, 30, 27, 23, 20, 17, 14, 32, 26, 25

18, 29, 24, 19, 16, 11, 22, 15, 17, 10

Prepare a frequency distribution table for the scores given:

42, 22, 55, 18, 50, 10, 33, 29, 17, 29, 29, 27, 34, 15, 40, 42, 40, 41, 35, 27,

44, 31, 38, 19, 54, 55, 38, 19, 20, 30, 42, 59, 15, 19, 27, 23, 40, 32, 28, 51.

Take the class intervals as 10-20, 20-30, 30-40, 40-50, 50-60.

From the frequency distribution table answer the following questions:

(i) What does the frequency corresponding to the class interval 20-30 indicate?

(ii) In which class intervals are the scores 10, 20 and 30 included?

(iii) Find the range of the scores.

In a school, 46 students of 9th standard, were told to measure the lengths of the pencilsin their compass-boxes in centimeters. The data collected was as follows.

16, 15, 7, 4.5, 8.5, 5.5, 5, 6.5, 6, 10, 12, 13, 4.5, 4.9, 16, 11, 9.2, 7.3, 11.4, 12.7, 13.9, 16, 5.5, 9.9, 8.4, 11.4, 13.1, 15, 4.8, 10, 7.5, 8.5, 6.5, 7.2, 4.5, 5.7, 16, 5.7, 6.9, 8.9, 9.2, 10.2, 12.3, 13.7, 14.5, 10

By taking inclusive classes 0-5, 5-10, 10-15.... prepare a grouped frequency distribution

table.

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28	17	15	22	29	21	23	27	18	12	7	2	9	4
1	8	3	10	5	20	16	12	8	4	33	27	21	15
3	36	27	18	9	2	4	6	32	31	29	18	14	13
15	11	9	7	1	5	37	32	28	26	24	20	19	25
19	20	6	9

28	17	15	22	29	21	23	27	18	12	7	2	9	4
1	8	3	10	5	20	16	12	8	4	33	27	21	15
3	36	27	18	9	2	4	6	32	31	29	18	14	13
15	11	9	7	1	5	37	32	28	26	24	20	19	25
19	20	6	9

Prepare a frequency distribution by inclusive method taking class interval of 7 from the following data. 28,17,15,22,29,21,23,27,18,12,7,2,9,4,6,1,8,3,10,5,20,16,12,8,4,33,27,21,15,9,3,36,27,18,9,2,4,6,32,31,29,18,14,13,15,11,9,7,1,5,37,32,28,26,24,20,19,25,19,20

Frequency Distribution (inclusive Method)

Prepare a frequency distribution by inclusive method taking class interval of 7 from the following data.
28,17,15,22,29,21,23,27,18,12,7,2,9,4,6,1,8,3,10,5,20,16,12,8,4,33,27,21,15,9,3,36,27,18,9,2,4,6,32,31,29,18,14,13,15,11,9,7,1,5,37,32,28,26,24,20,19,25,19,20

Frequency Distribution

(inclusive Method)

28	17	15	22	29	21	23	27	18	12	7	2	9	4
1	8	3	10	5	20	16	12	8	4	33	27	21	15
3	36	27	18	9	2	4	6	32	31	29	18	14	13
15	11	9	7	1	5	37	32	28	26	24	20	19	25
19	20	6	9